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It would depend on your definition of emulation, but FPGA implementations of consoles are often not considered emulation. Emulation is generally in reference to software interpreter programs, such as MAME, BSNES, Nestopia, etc. But if you just go with the definition of emulate then yes a FPGA is try...

Update time! I got hold of an old DOS 486 laptop with a real floppy controller. Got it working, even with the 1.6 MB special format! A bit of a hassle, but I dumped the disk with an application called DISK2IMG. Then I transferred the image from the old laptop via a PCMCIA CF-card adapter, the CF ca...

I think a lot of the time people underestimate the other part of SNES (or insert any other system) homebrew. The part where you "make a game". Designing and developing and actually completing any game is a big task. Developing a game or any program on a platform you aren't used to is going to introd...

Well Gradius III did end up getting the SA-1 treatment.

https://github.com/VitorVilela7/SA1-Roo ... radius-III

Optimization on stock hardware is more impressive. I agree, however given that SD2SNES supports SA-1 now it wouldn't be a bad alternative way to try to eliminate or reduce slowdowns in performance. Of course seeing what is possible with only enabling FastROM and optimizing some code has a special q...

whicker wrote:For Gradius 3, look here:
http://www.romhacking.net/forum/index.php?topic=27609.0

Nice to see someone making progress on the idea of improving Gradius III.

If you take a cheap PAL game and remove its CIC and replace the NTSC CIC chip inside the GDSF it will work. Otherwise if you do a lockout chip disable mod to the console that would work as well. You'll have to desolder the CIC from the PAL game but inside the GDSF it might be in a socket which would...

Most Game Doctor SF units are NTSC. Is your CIC in the PAL console disabled or are you certain the CIC in the GDSF is a PAL CIC?

LDA is the instruction Load Accumulator. It is the primary register on the 6502 cpu family. STA is Store Accumulator. X and Y are Index registers which can be used to access a memory location plus the value of the index. This way you can access a string or array of values by adding the index to the ...

Put a write breakpoint on the address you say is $6120. Start your new game and watch for $0A to be written to the address. The breakpoint will stop execution whenever $6120 is written which it might be written to more than just once. You'll want to see when it has the value you want to replace bein...

It seems that the only possible bottleneck is system RAM Of course it is,and as you can see, even with 24Mb of RAM(main+VRAM) the loadings are frequent(we can conclude there is a lot of VRAM transferts),so if you can have the benefit of a cartridge speed, you are inevitably limited by the amount of...

Bananmos wrote: But I'm guessing it's having the same problem with missing level translation?

Yes. All the board appears to do is try to convert the 5V power supply to 3V for powering the 3V parts. It doesn't account for the different voltage levels of all signals like address and data lines.

Post a picture if possible. Your banking routine could be flawed or your rendering. Copying data is not a good idea. It's possible you are copying over and corrupting data maybe. Or post code from some of your routines.

Byuu has made some requests for me to make a 21FX SNES bootloader device available for purchase as a dev tool. I may target a cartridge pass through version instead of exp port device though due to complications of aquiring/manufacturing a SNES EXP port female connector. If I can make that project ...

Much of the APU information would have first been obtained or leaked from development documents and more information probably became available due to emulation projects. No decapping involved. If you want to create a SNES APU in a FPGA perhaps cloning the CPU of the APU module would be the first log...